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http://forums.matronics.com/viewtopic.php?p=465133#465133________________________________ Message 2 _____________________________________
Time: 05:49:08 AM PST US
Subject: Re: Coolant Hose
From: "Roger Lee" <ssadiver1(at)yahoo.com (ssadiver1(at)yahoo.com)>
99% of the Rotax engines don't use silicone coolant hoses and they have run just
fine since 1990. Just use a good grade of 1" coolant hose. If the hose is not
at least 2" away from and exhaust pipe put some heat shield on that area. Hoses
like Gates Green Stripe are 4 ply.
Silicone hoses won't hurt, but aren't necessary.

You are supposed to be changing hoses every 5 years along with other rubber parts.
Not doing this is a roll of the dice. I think you just found out that isn't
worth it.

If this was an issue the entire Rotax engine users around the world would be busting
hoses.

http://forums.matronics.com/viewtopic.php?p=465135#465135________________________________ Message 4 _____________________________________
Time: 11:06:40 AM PST US
Subject: Re: Coolant Hose
From: "Roger Lee" <ssadiver1(at)yahoo.com (ssadiver1(at)yahoo.com)>
But you still have fuel, oil and the 17mm coolant hoses which there is no good
US equivalent. You have carb rubber sockets, engine mounts, carb diaphragm, carb
balance tube rubber.

As an example real Teflon hoses for an RV12 fuel system will run $550 (approximately).
Those still have to go into fire sleeve and so would oil hoses. Most of
the time leaks and cracking show up at the clamped area and not mid hose unless
the hose is being rubbed or too close to an exhaust pipe. How do you inspect
hose under fire sleeve and under a clamp?

For $550 I can buy all my hoses a couple times over and that would take care of
me for 10-15 years.

Flying safe and with some peace of mind is worth your time. If you can't afford
to keep a plane's maint. up then flying may not be the best hobby for you. Throwing
any old piece of hose you can on the engine and clamping it in place may
make you a hazard waiting to hurt you and your passenger not to mention the
high cost of any repair.

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